Warning light for a vehicle



FIG. 1 is an elevational view of warning light for a vehicle showing my new design;

FIG. 2 is a front elevational view thereof, with the rear being a mirror image;

FIG. 3 is a side elevational view thereof, with the opposite side being a mirror image;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for warning light for a vehicle, as shown and described. 